What was found
AIRCRAFT WAS GROUNDED: ABRUPT PITCH DOWN MOMENTS AFTER AUTOPILOT A ENGAGED AT FL310, SPEED MACH .79 AUTOPILOT B NORMAL.. REPLACED AUTOPILOT ELEVATOR ACTUATOR A PER AMM 22-11-26 .
- Difficulty date
- September 17, 2021
- Submitted
- September 20, 2021
- Operation
- Air carrier
- Aircraft
- N858NN
- Make and model
- Boeing 737823
- Aircraft serial
- 30904
- Aircraft time
- 33,031 hours, 13,538 cycles
- System (JASC)
- 2210 · Autopilot System
- Part
- Actuator
- Part number
- 158300101
- Part serial
- 23675
- Condition
- Faulted
- Location
- Elevator
- Part time
- 3,601 hours, 1,515 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- F
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.